You want to perform the database backup when user activity on your system is low, such as between 12:00 a.m. and 2:00 am. Which command terminates with an error if the backup is not complete at the end of the specified duration?()
A、RMAN> BACKUP DURATION 2:00 MINIMIZE LOAD DATABASE
B、RMAN> BACKUP DURATION 2:00 PARTIAL FILESPERSET 1 DATABASE
C、RMAN> BACKUP DURATION 2:00 PARTIAL MINIMIZE TIME DATABASE
D、RMAN> BACKUP AS COPY DURATION 2:00 PARTIAL MINIMIZE LOAD DATABASE
以昆虫为媒介而传播的疾病是()
A、麻疹
B、戊型肝炎
C、艾滋病
D、流行性出血热
E、结核病
After you back up /export using a file system snapshot, and you have removed the snapshot, you also need to remove the backing store. If the snapshot was created with: # mkdir /var/tmp/backup-snaps # fssnap -o bs=/var/tmp/backup-snaps /export Which file do you need to remove? ()
A、 A
B、 B
C、 C
D、 D
N是自然数集合,定义f:N→N,f(x)=xmod3,则f是( )。
A、满射不是单射
B、单射不是满射
C、双射
D、不是单射也不是满射
Click the Exhibit button. In the exhibit, the Compression > Basic > Endpoints page shows an icon of a red "X" under the tunnel status "IN" column. The error message displays, "No Request Received". What does this indicate?()
A、 There are no devices at the remote site.
B、 The remote side does not have QoS enabled.
C、 The remote side is not configured for compression to this endpoint.
D、 The remote side is not configured for decompression to this endpoint.
You need to ensure that the database users should be able to use the various flashback query features in order to go back in time by four hours. What would you do to achieve this?()
Aset SQL_TRACE=True
Bset UNDO_RETENTION=14400
Cset FAST_START_MTTR_TARGET=240
Dset LOG_CHECKPOINT_INTERVAL=240
Eset DB_FLASHBACK_RETENTION_TARGET=14400
Fset the RETENTION GUARANTEE clause for the undo tablespace